Seiford LM (1990). “Models, Extensions, and Applications of Data Envelopment Analysis: A Selected Reference Set.” Computers, Environment and Urban Systems 14(2): 171-175.

Seiford LM (1990). “Models, Extensions, and Applications of Data Envelopment Analysis: A Selected Reference Set.” Computers, Environment and Urban Systems 14(2): 171-175.

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